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  • 课堂复习内容(2)

                                                                               选择结构

    if:如果    else:否则    break:跳出     continue:持续     match:匹配

    gender:性别     random:随机数      score:成绩

    示例:1

       public class Demo{

          public static void main(String[]args){

           int  score=91;                     //可以把score写成输入;(详情在复习(1))

           if(score>=90){

             System.out.println("优");     // score>=90时;输出优

               }else{

             System.out.println("加油");  //score <90时;输出加油 

               }     

         }

         }

    示例:2

       嵌套结构:         

                          import java.util.*;
                             public class Test025 {
                             public static void main(String[] args) {
                               Scanner input = new Scanner(System.in);
                                 System.out.println("请输入成绩:");
                                      int score = input.nextInt();

                                       System.out.println("请输入性别:");
                                       char gender = input.next().charAt(0);

                                        if (score <= 10) {
                                           if (gender == '男') {
                                                System.out.println("进入男子决赛!");
                                                      } else if (gender == '女') {
                                                   System.out.println("进入女子决赛!");
                                                    }
                                                     } else {
                                                  System.out.println("淘汰!!");
                                               }
                                             }
                                        }

           

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  • 原文地址:https://www.cnblogs.com/LWLDD/p/6684616.html
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